multiple coil direct fire

[lukej]

MSII v3 pcb.

can someone just clear a couple of things up for me please. i'm following these instructions http://www.diyautotune.com/tech_article ... squirt.htm for multiple coils as i'm direct firing a ford edis coil using 2 BIP373's (no edis)

as it stands, ive finished the main board assembly and now i want to install my ignition, first off, where do i mount the 373's? do i just screw them to the case? and secondly, is it as simple as (regardless of mounting location) soldering:

left leg to a 330ohm resistor going to (1) top of r26 and (2) top of r29.
middle leg to (1) IGN and (2) IAC2B.
right leg to DB37 ground pins.

Thanks for your help

[SymTech Laboratories]

first off, where do i mount the 373's? do i just screw them to the case?

You can mount them directly on the case. Often, one can omit the injector driver current limiting circuit, which means you can install a second BIP373 where R37 or R38 would go on the heat sink bar. There's already a spot for the first BIP373 labeled "Q16". Wherever you mount them, be sure to use mica insulators.

and secondly, is it as simple as (regardless of mounting location) soldering:

left leg to a 330ohm resistor going to (1) top of r26 and (2) top of r29.
middle leg to (1) IGN and (2) IAC2B.
right leg to DB37 ground pins.

It's basically as simple as that. If you mount the first BIP373 as Q16, then you can just use a piece of jumper wire between IgbtOut and IGN. The wire with the 330 ohm resistor goes to IgbtIn, and R43 should either be installed or jumpered (do not leave it omitted).

There's some more information, as well as a diagram, on the subject here:

http://www.msextra.com/doc/ms2extra/MS2 ... htm#2coils

[lukej]

first off, where do i mount the 373's? do i just screw them to the case?

You can mount them directly on the case. Often, one can omit the injector driver current limiting circuit, which means you can install a second BIP373 where R37 or R38 would go on the heat sink bar. There's already a spot for the first BIP373 labeled "Q16". Wherever you mount them, be sure to use mica insulators.

and secondly, is it as simple as (regardless of mounting location) soldering:

left leg to a 330ohm resistor going to (1) top of r26 and (2) top of r29.
middle leg to (1) IGN and (2) IAC2B.
right leg to DB37 ground pins.

It's basically as simple as that. If you mount the first BIP373 as Q16, then you can just use a piece of jumper wire between IgbtOut and IGN. The wire with the 330 ohm resistor goes to IgbtIn, and R43 should either be installed or jumpered (do not leave it omitted).

There's some more information, as well as a diagram, on the subject here:

http://www.msextra.com/doc/ms2extra/MS2 ... htm#2coils

thankyou for your time

is IGBTIN the left leg of the 373 at Q16 then i take it.

[SymTech Laboratories]

is IGBTIN the left leg of the 373 at Q16 then i take it.

That's correct.

[kupa]

is IGBTIN the left leg of the 373 at Q16 then i take it.

That's correct.

Thanks for this reply